Postscriptum vs Brainy

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Postscriptum compared with Brainy
Detail	Postscriptum	Brainy
What it does	A private AI journal that turns your daily reflections into a memoir	Autonomous Chief of Staff for engineering leads and founders. Lives in Telegram and Slack.
Stage	MVP	Startup
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Free	Freemium
Pricing	$0 during open beta; paid plans to come later	Starter: Free forever. Pro: $9/month. Chief: $35/month. Monthly billing, cancel anytime, no credit card to start.
Key features	Nightly check-in with AI-generated questions Adaptive second question based on previous entries Unsealed entries that cannot be edited AI memoir generation in literary prose Weekly pattern digest AI-generated insights about themes and patterns Full archive with streaks and backstory	Text, voice, and photo capture in Slack and Telegram Whisper-v3 voice transcription with 99.8% accuracy Three-stage follow-up cadence: morning digest, nudge, and escalation Bidirectional sync with Obsidian, Notion, and Markdown vaults Meeting CoS that joins calls and converts notes to tasks Brain scans across Notion, Obsidian, and Google Sheets Approval inbox for all proposed vault writes Brain Health score tracking open loop hygiene and clarity Deduplication of repeating commitments across threads
What makes it different	The second question intelligently adapts based on what you previously wrote Entries are permanently sealed and cannot be edited Automatically composes your journal into a literary memoir	Does not train its own AI model on user tasks Approval-based vault sync prevents silent data overwrites
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	0	0
Citation Flow (Majestic)	12	0
Referring domains (Majestic)	1	0

6 details filled in for both companies.

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